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| author | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-15 17:00:18 +0200 |
| commit | e5f32a3856caabe745381279f7f32e3b581b59dc (patch) | |
| tree | 5448c1116966ba96096915e9022241638e5ab7f4 | |
| parent | 91c234b4e3419c786cac2d5b7a7b96443e512e3a (diff) | |
| download | linux-e5f32a3856caabe745381279f7f32e3b581b59dc.tar.gz linux-e5f32a3856caabe745381279f7f32e3b581b59dc.tar.bz2 linux-e5f32a3856caabe745381279f7f32e3b581b59dc.zip | |
sched: speed up context-switches a bit
speed up context-switches a bit by not clearing p->exec_start.
(as a side-effect, this also makes p->exec_start a universal timestamp
available to cache-hot estimations.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched_fair.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index c240b72b4e62..cea1fa32b3f4 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -379,15 +379,6 @@ update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se) se->exec_start = rq_of(cfs_rq)->clock; } -/* - * We are descheduling a task - update its stats: - */ -static inline void -update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se) -{ - se->exec_start = 0; -} - /************************************************** * Scheduling class queueing methods: */ @@ -609,8 +600,6 @@ static void put_prev_entity(struct cfs_rq *cfs_rq, struct sched_entity *prev) if (prev->on_rq) update_curr(cfs_rq); - update_stats_curr_end(cfs_rq, prev); - check_spread(cfs_rq, prev); if (prev->on_rq) { update_stats_wait_start(cfs_rq, prev); |